Figure 1
From: Combination bronchodilator therapy in the management of chronic obstructive pulmonary disease
Model of symptom/risk of evaluation of COPD [9]. From the Global Strategy for Diagnosis, Management and Prevention of COPD 2013, Global initiative for chronic Obstructive Lung Disease (GOLD), http://www.goldcopd.org. COPD = chronic obstructive lung disease; GOLD = Global initiative for chronic Obstructive Lung Disease; mMRC = modified Medical Research Council; CAT = COPD Assessment Test.